مورد إلكتروني
A multi-color video-ophthalmoscopes allows to measure the spectral distribution of light absorption of blood in the human retina
العنوان: | A multi-color video-ophthalmoscopes allows to measure the spectral distribution of light absorption of blood in the human retina |
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بيانات النشر: | Frontiers 2023-03-16 |
نوع الوثيقة: | Electronic Resource |
مستخلص: | Based on our previously developed mono-color video-ophthalmoscope a multi-color video-ophthalmoscope was developed. Using narrow band transmission filters, this instrument allows to measure the pulsatile cardiac cycle induced blood volume changes in the human retina for any wavelength in the sensitivity range of the used CMOS-camera. In this key experiment, video sequences (8 s, 25 fps, 200 frames) of the optic nerve head (ONH) were acquire for seven wavelengths between 475 nm and 677 nm one after the other. After image registration of all frames of each video sequence (to compensate for eye movements) and trend correction (to compensate for slow intensity changes), the amplitude of the cardiac cycle induced light intensity changes (pulsatile absorption amplitude PAA) can be calculated for all seven wavelengths. The results confirmed that the spectral distribution of PAA (lambda) follows the distribution of the light absorption of blood. The measured values correspond to the absorption of a thin blood layer of about 0.5 mu m thickness. |
مصطلحات الفهرس: | blood light absorption, photoplethysmography, video ophthalmoscopy, retina, multi-color imaging, retinal imaging |
URL: | Frontiers in Medicine |
الإتاحة: | Open access content. Open access content http://creativecommons.org/licenses/by/4.0 openAccess http://www.sherpa.ac.uk/romeo/issn/2296-858X Creative Commons Attribution 4.0 International |
ملاحظة: | 1 10 English |
أرقام أخرى: | CZBUT oai:dspace.vutbr.cz:11012/213626 Frontiers in Medicine. 2023, vol. 10, issue 1, p. 1-6. 2296-858X 183401 10.3389/fmed.2023.1125154 0000-0001-7053-6183 0000-0002-0469-6397 A-2237-2016 C-8547-2014 35753651000 1414218037 |
المصدر المساهم: | BRNO UNIV OF TECHNOL From OAIster®, provided by the OCLC Cooperative. |
رقم الأكسشن: | edsoai.on1414218037 |
قاعدة البيانات: | OAIster |
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